The 2" distilling column with a 2" bottom clamp is a stainless steel tower designed for home brewing. Beer Whisky Distillation Equipment Wine Distillery This is column is 2" for diameterm. It has 6 pipes in the distilling tower, each pipe is 6mm in diameter, which can assure a good performance of liqour cooling. 2” bottom clamp which join with the pot Any distillation question please feel free to ask.